Phase transitions in materials are typically accompanied
by structural changes to the lattice symmetry
[1]}, [2]}, [3]}. These changes include
individual lattice distortions [1]}, [3]},
grain rotations [2]} and lattice defect formations [7]}.
All of these influence the microstructures that form in a material
[7]}, [9]}.
In this paper, we introduce a modeling approach that couples
the lattice symmetry with the composition field. Two continuum methods,
namely a Cahn-Hilliard model and a phase field crystal model, are
coupled and solved to describe a phase transition process.
